Improve diskann-disk test coverage#1193
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Add 18 targeted unit tests covering previously untested error paths, control flow branches, and pure functions across 7 files. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #1193 +/- ##
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+ Coverage 89.64% 89.71% +0.06%
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Files 503 503
Lines 95761 96005 +244
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+ Hits 85848 86130 +282
+ Misses 9913 9875 -38
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arrayka
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Pull request overview
This PR increases unit test coverage in the diskann-disk crate by adding targeted tests for previously untested branches and error paths across utilities, PQ scratch handling, sector graph reconfiguration, quantization generator validation, continuation helpers, and checkpoint record management.
Changes:
- Add unit tests for partition-count estimation edge cases (clamping, odd rounding, k_base multiplier).
- Add tests covering error-path and basic-success behavior in k-means clustering, PQScratch query validation, quant generator parameter validation, sector graph reconfiguration/defaulting, continuation processing behavior, and checkpoint invalidation.
Reviewed changes
Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.
Show a summary per file
| File | Description |
|---|---|
| diskann-disk/src/utils/partition.rs | Adds tests for estimate_initial_partition_count edge cases. |
| diskann-disk/src/utils/kmeans.rs | Adds tests for successful clustering output shape and cancellation error path. |
| diskann-disk/src/storage/quant/generator.rs | Adds test for missing compressed-file validation when resuming with offset. |
| diskann-disk/src/search/provider/disk_sector_graph.rs | Adds tests for reconfigure growth/no-op and block-size defaulting. |
| diskann-disk/src/search/pq/pq_scratch.rs | Adds tests for rejecting undersized queries and accepting oversized queries. |
| diskann-disk/src/build/chunking/continuation/utils.rs | Adds tests for early stop, yield-then-continue, and error propagation (sync/async). |
| diskann-disk/src/build/chunking/checkpoint/checkpoint_record_manager_with_file.rs | Adds tests for fresh-state behavior, missing-file completion state, and invalidation semantics. |
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
…crosoft/DiskANN into u/arrayka/diskann-disk-tests3
arkrishn94
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Jun 23, 2026
arkrishn94
approved these changes
Jun 29, 2026
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Thanks Alex! Looks good to me.
metajack
approved these changes
Jun 30, 2026
added 3 commits
June 30, 2026 19:38
…k-tests3 # Conflicts: # diskann-disk/src/search/provider/disk_sector_graph.rs
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Adds 18 targeted unit tests to the
diskann-diskcrate covering previouslyuntested error paths, control flow branches, and pure functions.